The 1-pc DoubleSeal screw closure, equipped with an inner and outside sealing lip, provides a superior tight seal for 28mm PET one-way bottles with PCO 1810 neck. The slit tamper evidence band is assuring the integrity of the product and breaks reliable after first opening. The closure is enhanced with an Oxygen Scavenger (O2S), absorbing the oxygen in the head space of a bottle. Thus the filled product quality will be improved and, depending on the product, the shelf live of the product can be improved.